Ceiling trim seams

[tadam]

It looks like our trip from Michigan to Texas has taken it's toll on the ceiling trim seams. Almost all of them now have visible gaps. I want to try and repair them myself, but I also don't want to mess anything up, especially since it falls under warranty repair. Any one else have this same issue?

[MikeNChelle]

Ours has done the same thing. Seems to be a seasonal thing for us. In the Summer the gaps close back up. I'm guessing for us it's a moisture thing.